body,
html {
    position: fixed;
}

* {
    box-sizing: border-box;
}

canvas {
    border: 1px solid black;
    background: #000;
}

body {
    font-family: monospace;
    margin: 0;
    padding: 0;
    background: #000;
    overflow: hidden;
}

input {
    margin: 0;
}

.header {
    display: flex;
    justify-content: space-between;
    background: black;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    font-size: 20px;
}

.header__caption {
    color: #ffffff;
}

.header__form * {
    font-size: 16px;
    font-family: monospace;
    margin-right: 3px;
}

.header__form input {
    padding: 5px 10px;
}

.control-buttons {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    right: 30px;
}


.fixed-bottom.right {
    right: 0;
    left: auto;
}

@media (max-width: 1250px) {
    .header {
        display: block;
        font-size: 14px;
        padding: 10px;
    }

    .header__caption {
        display: none;
    }

    .control-buttons {
        right: 10px;
    }
}

